settings.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Theme Boost Campus Child - Settings file
 *
 * @package    theme_boost_campus_child
 * @copyright  2017 Kathrin Osswald, Ulm University <kathrin.osswald@uni-ulm.de>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

if ($ADMIN->fulltree) {

    // Create settings page with tabs.
    $settings = new theme_boost_admin_settingspage_tabs('themesettingboost_campus_child',
        get_string('configtitle', 'theme_boost_campus_child', null, true));

    // Create general tab.
    $page = new admin_settingpage('theme_boost_campus_child_general', get_string('generalsettings', 'theme_boost', null, true));

    // Settings title to group preset related settings together with a common heading. We don't want a description here.
    $name = 'theme_boost_campus_child/settingsheading';
    $title = get_string('settingsheading', 'theme_boost_campus_child', null, true);
    $setting = new admin_setting_heading($name, $title, null);
    $page->add($setting);

    // Add tab to settings page.
    $settings->add($page);
}